abstract |
Even when a tin-based polymerization catalyst and a phosphorus-based compound are present in a poly-L-lactic acid (A) and a poly-D-lactic acid (B), by using a specific proportion of an organic acid metal salt or an organic metal salt for stereocomplex crystallization, a stereocomplex polylactic acid composition having a high stereocomplex crystallinity and a high stereocomplex crystal melting point, a small stereocomplex crystal melting point depression even after remelting, a small decrease in the molecular weight, excellent forming processability, and also heat resistance can be provided. |